<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>demo</title>
    <script src="js/js1.js">





    </script>
    <link type="text/css"  rel="stylesheet" href="css/css1.css">
</head>


<body>

<div>
<p id="title" class="cs">Hello world!</p>
<a href="https://www.baidu.com" class="link1">百度 </a><br>
    <a href="demo1.html" class="link1">demo1</a><br>
    <input placeholder="请输入账号">&nbsp;<button onclick="myfunction()" id="main">提交</button>

<p id="demo"> </p>

</div>

</body>
</html>